Missing #include from pixbufanimationiter.h ?

[John Emmas <john creativepost co uk>]

Hi guys, I'm building an app which uses gtkmm ver 2.24.  By whatever 
route, the app ends up #including 'gdkmm/pixbufanimationiter.h'. Line 
187 looks like this:-

        bool advance(const Glib::TimeVal& current_time);

Unfortunately, MSVC tells me that 'TimeVal' is not a member of 'Glib'.  
My guess is that 'pixbufanimationiter.h' should be #including 
glibmm/timeval.h (which it doesn't).

I can fix the problem locally but ideally I guess this needs to get 
fixed upstream?  Thanks.

John